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MCQIntermediateExoplanets & Stellar Systems

USAAAO — 2024 First Round

Question 3

Aliens in a nearby star system (located in a random direction from Earth) are looking for nearby planets using the transit method. What is the probability that they can see the Earth transit across the Sun? (Assume they observe our Sun over multiple years and their instruments are sensitive enough to detect any transit that occurs.)

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Source

USAAAO 2024 First Round, Question 3. Question text, choices, and answer were transcribed from the official USAAAO exam and solutions PDFs.